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Summary of Portfolio of Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 52,511 $ 105,567
Gross Unrealized Gain 515 1,980
Gross Unrealized Loss 2,802 3,266
Fair Value 50,224 104,281
Mortgage-Related Securities | GSE certificates    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 7,748 [1] 7,786
Gross Unrealized Loss 445 [1] 460
Fair Value 7,303 [1] 7,326
Other Securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 44,763 97,781
Gross Unrealized Gain 515 1,980
Gross Unrealized Loss 2,357 2,806
Fair Value 42,921 96,955
Other Securities | Municipal bonds    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 584 583
Gross Unrealized Gain 47 48
Fair Value 631 631
Other Securities | Capital trust notes    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 9,463 9,458
Gross Unrealized Gain   2
Gross Unrealized Loss 2,046 2,217
Fair Value 7,417 7,243
Other Securities | Preferred Stock (Par Value: $0.01):    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 17,842 70,866
Gross Unrealized Gain 44 1,446
Gross Unrealized Loss 50 328
Fair Value 17,836 71,984
Other Securities | Mutual Funds and Common Stock    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 16,874 [2] 16,874
Gross Unrealized Gain 424 [2] 484
Gross Unrealized Loss 261 [2] 261
Fair Value $ 17,037 [2] $ 17,097
[1] Government-sponsored enterprise.
[2] Primarily consists of mutual funds that are Community Reinvestment Act-qualified investments.